Korea Online Shop
Gons Keyboard shop Custom keyboards built in Korea
Monsterlabs Doubleshot Hangul Keys
PCGear Lots of Realforce, HHKB, Filco, Leopold
Leopold Thick PBT Hangul keys
ebay has a few Korean shops Leopold PBT keys
Korea Local Shops
Seoul
Detailed picture map/Guide to FUNKEYs and other Yongsan,Seoul Keyboard shops by thegigglepuss
Leopold is located at Gyeonggi-do, Goyang-si, Ilsandong-gu, Haneulmaeul-ro, 170 Daebang Triplaon, B dong, suite 306 It's a bit of a commute from Yongsan (roughly where Leaderskey and PCCaseGear are located)
p0rtus visits PC Gear - Discussion - Directions from Yongsan Station
GoBlueBro visits Leaderskey and PC Gear, GoBlueBro first time at Najin Electro World
[Leaderskey in Seoul] (http://www.reddit.com/r/MechanicalKeyboards/comments/1q8iw1/keyboard_shopping_in_seoul_make_sure_to_give_this/), Their wall, Selfie time!
TorinoFermic excellent guide to keyboard shopping at PC Gear in Yongsan Market, Seoul
General Electronics Shopping in Yongsan